Which of the following is an example of forced convection?
A) A ceiling fan forcing warm air down B) Heat traveling along a metal rod
C) Air moving in a refrigerator D) A radiant heater placed in a room
A
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PROBLEM 2.2
A control rod made of yellow brass must not stretch more than in. when the tension in the wire is 800 lb. Knowing that E = 15 ? 106 psi and that the maximum allowable normal stress is 32 ksi, determine (a) the smallest diameter rod that should be used, (b) the corresponding maximum length of the rod.
_______ is a plant hormone thought to be important for induction of fruit development following seed set.
Fill in the blank(s) with the appropriate word(s).
Use the accompanying figure to compute angle C to the nearest hundredth of a degree. Angle A is 31o and angle B is 8o.
A. 25.41o B. 27.34o C. 30.75o D. 31.22o
Of all the grain crops, _____ is grown in every state in the United States
A) barley B) sorghum C) corn D) wheat